Signed, Sealed, Delivered The pilot for the upcoming series "Dead Letters" introduces a group of postal workers who have made it their mission to get undeliverable mail to its destination. Eric Mabius, Daphne Zuniga, Kristin Booth, Crystal Lowe and Geoff Gustafson star. 9 p.m. Hallmark

The Perks of Being a WallflowerLogan Lerman plays a high-school freshman who feels completely out of step with others until two stepsiblings (Emma Watson, Ezra Miller) make him a living project of sorts, steering him through many coming-of-age rites — not the least of which is first love. Mae Whitman and Dylan McDermott also star. 9 p.m. Showtime